That’s kind of weird considering how, according to Kasdan, Lucas once told him that using the Force was something that anyone could train themselves to do.
http://www.huffingtonpost.com/2013/05/22/star-wars-prequels-return-of-the-jedi_n_3313793.html
Lucas: Yes, everybody can do it.
Kasdan: Not just the Jedi?
Lucas: It’s just the Jedi who take the time to do it.
Marquand: They use it as a technique.
Lucas: Like yoga. If you want to take the time to do it, you can do it; but the ones that really want to do it are the ones who are into that kind of thing. Also like karate.